❻ 3. Earth's Changing Surface

What is the rock cycle?

• A process with a clear start and end

• A cycle that only occurs in volcanic regions

• A continuous process of rock formation, change, and recycling

• A process that only forms igneous rocks

Which type of rock is formed from molten rock cooling and solidifying?

• Sedimentary rock

• Metamorphic rock

• Igneous rock

• Limestone

What process involves the breaking down of rocks into smaller pieces?

• Weathering

• Erosion

• Compaction

• Deposition

Which type of rock is formed by extreme heat and pressure?

• Metamorphic rock

• Sedimentary rock

• Igneous rock

• Basalt

What is the theory of plate tectonics?

• The Earth's core is made of tectonic plates

• Tectonic plates are stationary

• The lithosphere is divided into tectonic plates that move

• The Earth's crust is a single solid piece

What are tectonic plates?

• Molten rock beneath the Earth's surface

• Layers of sedimentary rock

• Small rocks floating in the ocean

• Large, rigid pieces of the Earth's lithosphere

Which type of plate boundary involves plates moving toward each other?

• Seafloor spreading

• Divergent boundaries

• Transform boundaries

• Convergent boundaries

What causes tectonic plates to move?

• Ocean currents

• Convection currents in the mantle

• Wind currents

• Magnetic fields

What is the outermost layer of the Earth called?

• Mantle

• Outer core

• Crust

• Inner core

What is seafloor spreading?

• The process of sedimentary rock formation

• The movement of tectonic plates toward each other

• The formation of new ocean crust at mid-ocean ridges

• The cooling and solidification of magma